Device for crimping paper sacks



(No Mo del.) 2 Sheets-Sheet 1.

E. G. GODFREY.

DEVICE FOR GRIMPING PAPER SACKS. v No. 349,391. Patented Sept. 21,- 188.6.

(No Model.)

2 Sheets-Sheet 2. E. O. GODFREY.

DEVICE FOR GRIMPING PAPER SACKS.

No. 349,391. Patented-Sept. 21,-1886.

chine.

UNITED STATES PATENT OFFICE.

EDiVARD O. GODFREY, OF PITTSBURG, PENNSYLVANIA.

DEVICE FOR CRIMPING PAPERSACKS.

SPECIFICATION i'mming partof Letters Patent No. 349,391, dated September 21, 1886.

Application filed November 2, 18'c5. Serial No. 181,535. (No model.) I

To all whom it may concern.-

Be it known that I, EDWARD O. GODFREY, a resident of the city of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Devices for Crimping Paper Sacks; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a side view of my improved ma- Fig. 2 is a front view thereof. Fig. 3 is a vertical cross-section of the crimping-rolls on the line a: of Fig. 1. Fig. 4 is a similar section on the lineg :1 thereof. Fig. 5 is adiagram plan View of the fluted part ofa sack. Fig.6 isa plan view of a machine shown in connection with the delivery -table of a sack-bottoming machine. Fig. 7 is an axial section of the fiuting-rolls.

Like symbols of reference indicate'like parts in each.

In the drawings, 2 represents a longitudi-' nally-slotted guide-table 'of a paper-sack machine, from which the finished sacks 3 are delivered in the form shown in Fig. 2that is to say, with their sides lying flat against each other, and with the bottoms flattened down and extending in T shape from the body or tube of the sack.- supported by-the surface of the table, and its body hangs down through the slot 4 therein. The sack is conveyed through the extent of this slot to its exit from the machine.

After the paper sack has been formed and pasted by the machine it has been usual to flute or crimp the sides for a considerable distance from the mouth to the bottomsay, for about one-fourth or one-third of itslength-so that when the sack is filled with flour or other merchandise its mouth may be easily drawn together and tied with a cord. This has been done by an imperfect machine, and at a distinct operationfrom the forming of the sack, and has entailed considerable trouble and increase of cost. I have devised an addition to the machine, by which the sack, after it has been pasted, is delivered directly to the crimping mechanism, which is 'so constructed that the sack is discharged from the machine per- The bottom of the sack is fectly shaped and crimped. I will describe this improvement in detail.

5 and dare a pair of parallel and adjaceiitlysituate rolls, whose peripheries are longitudinally fluted, and whose axes are suitably jour naled at both ends in a housing-frame, 7. The rolls are placed at the exit of the bag-machine, with their line of contact in the path of the sack, and their axes are slightly inclined from the perpendicular toward the machine, as shown in Figs. 1, 2, and 6. The fluting'of the rollsis made deeper at their lowerend than at the upper end, and tapers in depth gradually between these points. This is shown by the sectional Figs. '3, 4, and 7. One of the rolls, 6, is driven by apinion, 9,which meshes with a gear-wheel, 8, on its axis, and the other roll is driven by frictional contact with the first, though both may be driven by gearing, if de sired.

' represents the driven belt-wheels, operatingthe endless chains or belts which move the bag from the adit to the exit of the machine; and 11 is a flared V-shape'd guide, which receives the bags at the exit, and guides them in succession to the crimping-rolls. The latter are so situate that when the bag is delivered to them with its spread bottom resting on the table 2, only the portion ofthe bag near its month shall be engaged by the rolls.

Thus constructed the operation of my improved apparatus is as follows: The rolls having been set in motion the bag is carried by the endless chains along the slot in the table'2 in a vertical position, and with its mouth downward into the flaring guide 11, which receives 1 it and directs it, still vertically, to the flutingrolls. The rolls being inclined, as shown, their upper corners will first engage the bag, and in drawing the bag between their faces the rolls will impart to it a partial rotation, as if on a center near its bottom, thereby making the flutes in the bag in the directions shown in the diagram, Fig. 5. Because of the tapering form of the flutes on the rolls, the flutes or creases on the bag will be deeper toward its mouth than at the inner ends. This not only enables the sack to be more easily tied, but it is otherwise important, since, if the flutes were as deep toward the middle part of the sack as they must be at the mouth, they would so weaken the substance of the sack as to greatly impair its value as a merchantable article. If it be attempted to crease the sack with rolls whose axes are parallel to its median line, and whose flutes are 'of constant depth, the sacks will often wrinkle and bend, so much as to destroy them. This is caused partly by the fact that the finished sacks are generally of less diameter at the mouths than at their middle parts, and I have found that by inclining the rolls and tapering their flutes the wrinkling may be entirely obviated. Both the tapered flutes and the inclination of the rolls aid in producing this result, and as each separately is beneficial I desire to embody them in separate claims."

The advantages of the machine, constructed as thus described, are that by its use the crimping of paper sacks is done rapidly and effectively without in any way injuring the material of which the sacks are made.

I am aware that it is not new to crimp paper sacks by forming the paper into the ordinary tube form, and then, before shaping and forming the bottom, passing it directly from the machine in which the tube is made between horizontal rolls, a partof whose peripheryis fluted, so that when the tube is out into lengths the portions forming the upper ends of the sacks shall be crimped. This machine cannot well be used to crimp the sacks after the bottoming process, and asubsequenthandling and bottoming is made necessary. By means of my upright rolls situate at the exit of the delivery-table of a bottoming-machine, and having their upper journals separated to allow passage of the sack, the forming of the sack, its bottoming, and crimping, may be done at a single pass through the machine, and by obviating the necessity for aseparate handling 0 of the sacks in crimping there is a saving of time and labor. The manufacture of sacks is thus greatly improved, and its expense is lessened.

What I claim as my invention, and desire to 5 stantially as and for the purposes described.

2. As a device for crimping paper sacks, the combination of adjacent rotary fluted rolls Whose axes-are inclined to the position of the median lines of the sacks as they are fed thereto, substantially as and for the purposes described.

3. As a device for .crimping paper sacks, the combination of adjacent rotary fluted rolls whose flutes taper in depth, and whose axes are inclined to the position of the median lines of the sacks as they are fed thereto, substantially as and for the purposes described.

4. The combination of the delivery-table 2, for supporting the bottoms of paper sacks and guiding them in an upright position, and adjacent upright fluted rolls situate at the de livery end of the table, for receiving the sacks and crimping them, substantially as and for the purposes described.

In testimony whereof I have hereunto set myhand this 27th day of October, A. D. 1885.

EDNVARD O. GODFREY.

\Vitnesses:

THOMAS WV. BAKEW'ELL, JNo. K. SMITH. 

